From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Diagrams illustrating gear hobbing, showing cutting zones, lines of action, and hob teeth.
| Identifier | ExFiles\Box 136\5\ scan0348 | |
| Date | 15th January 1940 guessed | |
| Fig No 16, Fig No 17, LINES OF ACTION, GENERATING ZONE, TOTAL CUTTING ZONE, GENERATING PLANE, HOB, BLANK, TEETH AT EITHER END NOT IN USE, ROUGHING ZONE, HUB OR PROOF DIAMETER, Fig 18 SHOWING HOB TEETH IN ROUGHING AND FINISHING ZONES | ||